| /* |
| * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jni.h" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "jfr/jfr.hpp" |
| #include "jfr/jni/jfrJavaSupport.hpp" |
| #include "jfr/recorder/jfrRecorder.hpp" |
| #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp" |
| #include "jfr/recorder/service/jfrRecorderThread.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "memory/universe.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/mutexLocker.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "utilities/preserveException.hpp" |
| #include "utilities/macros.hpp" |
| |
| static Thread* start_thread(instanceHandle thread_oop, ThreadFunction proc, TRAPS) { |
| assert(thread_oop.not_null(), "invariant"); |
| assert(proc != NULL, "invariant"); |
| |
| bool allocation_failed = false; |
| JavaThread* new_thread = NULL; |
| { |
| MutexLocker mu(Threads_lock); |
| new_thread = new JavaThread(proc); |
| // At this point it may be possible that no |
| // osthread was created for the JavaThread due to lack of memory. |
| if (new_thread == NULL || new_thread->osthread() == NULL) { |
| delete new_thread; |
| allocation_failed = true; |
| } else { |
| java_lang_Thread::set_thread(thread_oop(), new_thread); |
| java_lang_Thread::set_priority(thread_oop(), NormPriority); |
| java_lang_Thread::set_daemon(thread_oop()); |
| new_thread->set_threadObj(thread_oop()); |
| Threads::add(new_thread); |
| } |
| } |
| if (allocation_failed) { |
| JfrJavaSupport::throw_out_of_memory_error("Unable to create native recording thread for JFR", CHECK_NULL); |
| } |
| Thread::start(new_thread); |
| return new_thread; |
| } |
| |
| JfrPostBox* JfrRecorderThread::_post_box = NULL; |
| |
| JfrPostBox& JfrRecorderThread::post_box() { |
| return *_post_box; |
| } |
| |
| // defined in JfrRecorderThreadLoop.cpp |
| void recorderthread_entry(JavaThread*, Thread*); |
| |
| bool JfrRecorderThread::start(JfrCheckpointManager* cp_manager, JfrPostBox* post_box, TRAPS) { |
| assert(cp_manager != NULL, "invariant"); |
| assert(post_box != NULL, "invariant"); |
| _post_box = post_box; |
| |
| static const char klass[] = "jdk/jfr/internal/JVMUpcalls"; |
| static const char method[] = "createRecorderThread"; |
| static const char signature[] = "(Ljava/lang/ThreadGroup;Ljava/lang/ClassLoader;)Ljava/lang/Thread;"; |
| |
| JavaValue result(T_OBJECT); |
| JfrJavaArguments create_thread_args(&result, klass, method, signature, CHECK_false); |
| |
| // arguments |
| create_thread_args.push_oop(Universe::system_thread_group()); |
| create_thread_args.push_oop(SystemDictionary::java_system_loader()); |
| |
| JfrJavaSupport::call_static(&create_thread_args, CHECK_false); |
| instanceHandle h_thread_oop(THREAD, (instanceOop)result.get_jobject()); |
| assert(h_thread_oop.not_null(), "invariant"); |
| // attempt thread start |
| Thread* const t = start_thread(h_thread_oop, recorderthread_entry,THREAD); |
| if (!HAS_PENDING_EXCEPTION) { |
| Jfr::exclude_thread(t); |
| cp_manager->register_service_thread(t); |
| return true; |
| } |
| assert(HAS_PENDING_EXCEPTION, "invariant"); |
| // Start failed, remove the thread from the system thread group |
| JavaValue void_result(T_VOID); |
| JfrJavaArguments remove_thread_args(&void_result); |
| remove_thread_args.set_klass(SystemDictionary::ThreadGroup_klass()); |
| remove_thread_args.set_name(vmSymbols::remove_method_name()); |
| remove_thread_args.set_signature(vmSymbols::thread_void_signature()); |
| remove_thread_args.set_receiver(Universe::system_thread_group()); |
| remove_thread_args.push_oop(h_thread_oop()); |
| CautiouslyPreserveExceptionMark cpe(THREAD); |
| JfrJavaSupport::call_special(&remove_thread_args, THREAD); |
| return false; |
| } |